A single chlorine free radical can destroy how many ozone molecules ?

Related Mcqs:

Which of the following is a macro nutrient ?

A. boron B. iron C. copper D. carbon...

In the purification of portable water the coagulant used is_________________?

A. alum B. nickel sulphate C. copper sulphate D. barium sulphate...

Newspaper can be recycled again and again how many times ?

A. 2 B. 3 C. 4 D. 5...

Major cause of SO2 on global scale is__________________?

A. volcanoes B. electric sparks C. combustion D. all...

The yellow colour in photochemical smog is due to presence of__________________?

A. dinitrogen oxide B. nitrogen dioxide C. chlorine gas D. chlorine dioxide...